Why is there a need for digestion of food?

Answer 1

The digestive system is the body system involved in the taking in and processing of food for use by body cells. The digestive system is made up of the digestive tract, which begins at the mouth, and ends at the anus. The major functions of the digestive system are taking in food, breaking food down into molecules that are small enough for the body to absorb, taking up the small molecules and getting rid of undigested molecules and waste. The digestive system organs include the pharynx, esophagus, stomach, small intestine, large intestine, rectum, liver and pancreas. The digestive system is a very efficient system for processing food and obtaining nutrients because it breaks the food up into small molecules to be absorbed by cells,

Answer 2

because otherwise you'll die of indigestion.

Answer 3

to convert protiens etc. into blood